Marcus Müller a.k.a. "Tethpub ZNeK"
crack-admin/coderâ„¢

Booting Windows 10 from external media

27.06.2020

Booting Windows 10 from external media on a new MacBook Pro isn't as easy as it used to be, but IT CAN BE DONE! :-)

The Mac will only boot via EFI, hence the Windows 10 disk has to be formatted as GPT . When looking for a tool to convert a Windows installation from MBR to GPT I stumbled across several dubious looking 3rd party tools at first. After a while I realized that Windows 10 already ships with a tool that does the job - MBR2GPT.exe. This took a while but did work.

However, the Mac won't boot Windows directly - it has to be blessed (!) first.

In order to bless the Windows installation you have to boot the Mac into Recovery (!), then open a terminal and cast the secret spells:

csrutil disable
bless -mount /Volumes/BOOTCAMP -setBoot
csrutil enable

Not too obvious I guess.